Brother KE-430B Service Manual page 190

8. ELECTRIC MECHANISM
Error status #8 Error code appears on the display window when the foot switch is depressed.
Probable causes
5. Head position sensor
defective when
mechanism does not move
and error code E-17 appears
on the display window.
([E.16] KE-436B, 436C)
Error status #9 Work clamp does not rise.
Probable causes
1. Foot switch and cord defec-
tive
(First Connector on the cord
position)
Work
clamp
(Second
position)
Start
Second position work clamp
(Pneumatic only)
<Solenoid specifications>
2. Work clamp is not lowered
when error code
appears on the
window.
183
is a. Separate P1A (ORG1) connector on the
the feed main
resistance between pins 7 and 8 in the
connector on the cord.
When machine head is horizontal: If the
resistance is 0Ω, it is not defective.
When machine head is tilted back: If the
resistance is ∞Ω, it is not defective.
b. If item a cause no problem, the main
circuit board is defective.
3640Q
(Make sure that the power is turned off.)
• Remove the connector for foot switch
connected to the outside of the contorl
box, and check the continuity between
pins 1 and 2, and pins 7 and 8 in the
connector on the cord. (For pneumatic
specification, check the continuity be-
tween pins 3 and 4.)
The continuity in each case should be
normally   or 0  when the foot switch
is depressed.
3636Q
a. If it is not lowered due to the mechanical
E-60 lock, see "5-22. Adjusting the positions of
display the presser solenoid" for adjustment.
b. Open the top cover, turn on the power
switch, and press the tip of the plunger of
the presser solenoid. If the work clamp
sensor LED is turned on and off, it is OK.
c. Make sure P1 (ORG) connector on the
main circuit board and work clamp sensor
are plugged in.
d. See "8-9. Checking the input sensor and
DIP switch input" to make sure that the
work clamp sensor is connected.
If item b causes no problem and item c
results in defective sensor input, either
the cord connection is poor or the main
circuit board is defective.
KE-430B, 430C series
Check/ repair/ adjust
circuit board. Measure
Check/ repair/ adjust
Parts to be replaced
Head position sensor
the
Main circuit board
Parts to be replaced
Foot switch
Work clamp sensor
Main circuit board